EP1870368A1 - Elevator device - Google Patents
Elevator device Download PDFInfo
- Publication number
- EP1870368A1 EP1870368A1 EP05730419A EP05730419A EP1870368A1 EP 1870368 A1 EP1870368 A1 EP 1870368A1 EP 05730419 A EP05730419 A EP 05730419A EP 05730419 A EP05730419 A EP 05730419A EP 1870368 A1 EP1870368 A1 EP 1870368A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- speed
- raised
- car
- generator
- abnormal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
Definitions
- the present invention relates to an elevator apparatus equipped with an emergency stop device for forcibly stopping a car or a counterweight.
- a car may be mounted with an emergency stop device which operates through an electromagnetic actuator to swiftly perform an operation of stopping the car.
- the electromagnetic actuator is operated by being supplied with a power from a battery (see Patent Document 1).
- Patent Document 1 WO 2004-083091
- the present invention has been made to solve the above-mentioned problems, and it is therefore an obj ect of the present invention to obtain an elevator apparatus in which an emergency stop device for forcibly stopping raised/lowered bodies is allowed to operate more swiftly and more reliably when a car and a counterweight (raised/lowered bodies) are traveling at an excessively high speed.
- An elevator apparatus includes: a generator for generating a power corresponding to a speed of a raised/lowered body; and an emergency stop device with which the raised/lowered body is mounted, for being operated by the power generated by the generator to forcibly brake the raised/lowered body when the speed of the raised/lowered body is abnormal.
- Fig. 1 is a schematic diagram showing an elevator apparatus according to Embodiment 1 of the present invention.
- a pair of car guide rails 2 and a pair of counterweight guide rails (not shown) are installed within a hoistway 1.
- a car 3 as a raised/lowered body is disposed between the respective car guide rails 2
- a counterweight 4 as a raised/lowered body is disposed between the respective counterweight guide rails.
- the car 3 is raised/lowered within the hoistway 1 while being guided by the respective car guide rails 2
- the counterweight 4 is raised/lowered within the hoistway 1 while being guided by the respective counterweight guide rails.
- a deflector pulley 5, a hoisting machine 6 as a drive device for generating a driving force for raising/lowering the car 3 and the counterweight 4, are provided in an upper portion of the hoistway 1.
- the hoistingmachine 6 has a drive device body 7 including a motor, and a drive sheave 8 rotated by the drive device body 7.
- a plurality of main ropes 9 are looped around the deflector pulley 5 and the drive sheave 8.
- the car 3 and the counterweight 4 are suspended within the hoistway 1 by means of the respective main ropes 9.
- the car 3 and the counterweight 4 are raised/lowered within the hoistway 1 through rotation of the drive sheave 8.
- the car 3 is mounted with a pair of emergency stop devices 10 facing the car guide rails 2, respectively.
- the emergency stop devices 10 have braking portions 11 for generating braking forces applied to the car 3 and electromagnetic drive portions 12 for operating the braking portions 11 through energization, respectively.
- the braking portions 11 have wedges 13, which can move into contact with and away from the car guide rails 2, respectively.
- the wedges 13 are pressed against the car guide rails 2, respectively, through operation of the braking portions 11, respectively.
- the braking portions 11 When the wedges 13 are pressed against the car guide rails 2, respectively, the braking portions 11 thereby generate braking forces applied to the car 3, respectively.
- the car 3 is forcibly stopped by the braking forces generated through operations of the respective braking portions 11.
- the car 3 is also mounted with a pulley device (rotational body device) 17, which has a first driven pulley 14 and a second driven pulley 15 as a pair of rotational bodies rotated in accordance with the speed of the car 3 and an urging device 16 for urging the first driven pulley 14 and the second driven pulley 15 away from each other.
- the pulley device 17 is provided on a lower portion of the car 3.
- the first driven pulley 14 and the second driven pulley 15 are disposed vertically in alignment with each other. That is, the first driven pulley (one of the rotational bodies) 14 is disposed above the second driven pulley (the other rotational body) 15.
- a governor rope 18 is looped around the first driven rope 14 and the second driven rope 15 so as to surround them together.
- the governor rope 18 is connected at one end thereof to the upper fixed member 19 via a spring (elastic body) 21.
- the governor rope 18 is connected at the other end thereof to the lower fixedmember 20 via a spring (elasticbody) 22.
- the governor rope 18, which extends from the lower fixed member 20 side to the upper fixed member 19 side, is looped around the first driven pulley 14 and then around the second driven pulley 15.
- a tensile force is applied to the governor rope 18 owing to respective urging forces of the springs 21 and 22 and the urging device 16.
- frictional forces are generated between the governor rope 18 and the first driven pulley 14 and between the governor rope 18 and the second driven pulley 15, respectively.
- the pulley device 17 is moved with respect to the governor rope 18 when the car 3 is raised/lowered within the hoistway 1.
- the first driven pulley 14 and the second driven pulley 15 are thereby rotated in accordance with the speed of the car 3. In other words, the rotational speeds of the first driven pulley 14 and the second driven pulley 15 increase as the speed of the car 3 increases, and decrease as the speed of the car 3 decreases.
- a car shock absorber 23 for absorbing a shock caused to the car 3 upon a fall thereof and a counterweight shock absorber 24 for absorbing a shock caused to the counterweight 4 upon a fall thereof are installed on a bottom portion within the hoistway 1.
- a control cable (mobile cable) 25 for transmitting information between a control device (not shown) for controlling operation of an elevator and the car 3 is connected to the car 3.
- Fig. 2 is a schematic diagram showing an essential part of the elevator apparatus of Fig. 1.
- Fig. 3 is a lateral view showing the pulley device 17 of Fig. 2.
- the car 3 is mounted with a first generator 26 and a second generator 27 for generating power through movement of the car 3, and a first car speed detector 28 and a second car speed detector 29 for detecting a speed of the car 3.
- the first generator 26 and the first car speed detector 28 are provided on a rotational shaft of the first driven pulley 14.
- the second generator 27 and the second car speed detector 29 are provided on a rotational shaft of the second driven pulley 15.
- the first generator 26 and the first car speed detector 28 may be integrated with the first driven pulley 14 or engaged with an outer peripheral portion of the first driven pulley 14 instead of being provided on the rotational shaft of the first driven pulley 14.
- the second generator 27 and the second car speed detector 29 may be integrated with the second driven pulley 15 or engaged with an outer peripheral portion of the second driven pulley 15 instead of being provided on the rotational shaft of the second driven pulley 15.
- the first generator 26 generates a power corresponding to a speed of the car 3 based on rotation of the first driven pulley 14.
- the second generator 27 generates a power corresponding to a speed of the car 3 based on rotation of the second driven pulley 15.
- the respective emergency stop devices 10 are operated by the powers generated by the first generator 26 and the second generator 27 when the speed of the car 3 is abnormal (excessively high). That is, the magnitudes of the powers generated by the first generator 26 and the second generator 27 increase as the speed of the car 3 increases, so the emergency stop devices 10 do not operate until the magnitudes of the powers generated by the first generator 26 and the second generator 27 reach predetermined values at the time when the speed of the car 3 has abnormally increased.
- the first car speed detector 28 generates a signal corresponding to a speed of the car 3 based on rotation of the first driven pulley 14.
- the second car speed detector 29 generates a signal corresponding to a speed of the car 3 based on rotation of the second driven pulley 15.
- encoders can be mentioned as the first car speed detector 28 and the second car speed detector 29.
- the car 3 is mounted with a speed governing device 30 and a backup circuit 31 for supplying the electromagnetic drive portions 12 with powers from the first generator 26 and the second generator 27 only when the speed of the car 3 is abnormal.
- the speed governing device 30 has a power receiving portion 32 for receiving powers from the first generator 26 and the second generator 27, and a speed governing control portion 33 for determining, based on respective pieces of information from the first car speed detector 28 and the second car speed detector 29, whether or not the speed of the car 3 is abnormal, thereby supplying the respective emergency stop devices 10 with the powers received by the power receiving portion 32 only when the speed of the car 3 is abnormal.
- the power receiving portion 32 supplies the speed governing control portion 33 with the powers from the first generator 2 6 and the second generator 27 as a control power source for a control operation of the speed governing device 30 and an emergency operation power source for causing the electromagnetic drive portions 12 of the emergency stop devices 10 to operate.
- the speed governing control portion 33 is allowed to perform the control operation by being supplied with the control power source from the power receiving portion 32.
- the speed governing control portion 33 has a first processing portion 34 for determining, based on information from the first car speed detector 28, whether or not the speed of the car 3 is abnormal, a second processing portion 35 for determining, based on information from the second car speed detector 29, whether or not the speed of the car 3 is abnormal, and an emergency output portion 36 for supplying the respective emergency stop devices 10 with the emergency operation power source from the power receiving portion 32 when at least one of the first processing portion 34 and the second processing portion 35 has determined that the speed of the car 3 is abnormal.
- An overspeed setting pattern as a reference for determining whether or not the speed of the car 3 is abnormal, which corresponds to a vertical position within the hoistway 1, is set in advance in each of the first processing portion 34 and the second processing portion 35.
- the overspeed setting pattern is set so as to continuously decrease within a predetermined section in the vicinity of each of terminal portions (upper terminal portion and lower terminal portion) of the hoistway 1 as the distance therefrom decreases.
- the first processing portion 34 has a first calculation portion 37 for acquiring a signal from the first car speed detector 28 as car information and calculating a position and a speed of the car 3 based on the acquired car information, and a first determination portion 38 for comparing the position and the speed of the car 3 calculated by the first calculation portion 37 with the overspeed setting pattern to determine whether or not the speed of the car 3 is abnormal.
- the second processing portion 35 has a second calculation portion 39 for acquiring a signal from the second car speed detector 29 as car information and calculating a position and a speed of the car 3 based on the acquired car information, and a second determination portion 40 for comparing the position and the speed of the car 3 calculated by the second calculation portion 39 with the overspeed setting pattern to determine whether or not the speed of the car 3 is abnormal.
- the emergency output portion 36 determines, based on respective pieces of information from the first determination portion 38 and the second determination portion 40, whether or not the respective emergency stop devices 10 should be supplied with the emergency operation power source from the power receiving portion 32. That is, the emergency output portion 36 determines, based on dual determinations, namely, a determination made by the first determination portion 38 and a determination made by the second determination portion 40, whether or not the respective emergency stop devices 10 should be supplied with the emergency operation power source from the power receiving portion 32.
- the backup circuit 31 determines, based on magnitudes of powers from the first generator 26 and the second generator 27, whether or not the speed of the car 3 is abnormal, and supplies the electromagnetic drive portions 12 with the powers from the first generator 26 and the second generator 27 only when it is determined that the speed of the car 3 is abnormal.
- An abnormality determination set value as a reference for determining whether or not the speed of the car 3 is abnormal through a comparison between the magnitudes of the powers from the first generator 26 and the second generator 27 is set in the backup circuit 31.
- the abnormality determination set value is set higher than a rated speed of the elevator.
- the electromagnetic drive portions 12 are supplied with powers from at least one of the speed governing device 30 and the backup circuit 31, the respective emergency stop devices 10 are thereby operated to forcibly generate braking forces applied to the car 3.
- the control operation of the speed governing device 30 is performed in response to the supply of powers from the first generator 26 and the second generator 27.
- the first processing portion 34 determines, based on the signal from the first car speed detector 28, whether or not the speed of the car 3 is abnormal
- the second processing portion 35 determines, based on the signal from the second car speed detector 29, whether or not the speed of the car 3 is abnormal.
- the backup circuit 31 determines, based on the magnitudes of the powers from the first generator 26 and the second generator 27, whether or not the speed of the car 3 is abnormal.
- the respective emergency stop devices 10 are stopped from being supplied with powers from the speed governing device 30 and the backup circuit 31, respectively.
- the car 3 is not forcibly stopped through operations of the respective emergency stop devices 10.
- the powers generated by the first generator 26 and the second generator 27 are supplied to the respective emergency stop devices 10 from the emergency output portion 36 of the speed governing device 30.
- the magnitudes of the powers supplied to the respective emergency stop devices 10 from each of the speed governing device 30 and the backup circuit 31 are large enough to operate the respective emergency stop devices 10 because the speed of the car 3 has abnormally increased. Accordingly, when the speed of the car 3 has abnormally increased, the respective emergency stop devices 10 are supplied with a power from the speed governing device 30 or the backup circuit 31 to be operated, so the car 3 is stopped from moving.
- the first generator 26 and the second generator 27 generate powers corresponding to the speed of the car 3, and the emergency stop devices 10 are operated by the powers of the first generator 26 and the second generator 27 at the time when the speed of the car 3 is abnormal. Therefore, moving energy of the car 3 can be converted intoapower. Even when the speed of the car 3 has abnormally increased in the event of a blackout, powers large enough to operate the respective emergency stop devices 10 can be generated by the first generator 26 and the second generator 27. Accordingly, the emergency stop devices can be prevented from failing to operate for reasons of, for example, a deterioration in a battery, in the event of a blackout. As a result, the emergency stop devices 10 can be operated more reliably in a shorter period of time.
- the car 3 is mounted with the first generator 26 and the second generator 27, so the respective emergency stop devices 10 can be prevented from being stopped from being supplied with powers owing to, for example, breakage of the control cable 25. As a result, the respective emergency stop devices 10 can be supplied with powers more reliably.
- the first car speed detector 28 and the second car speed detector 29 generate signals corresponding to the speed of the car 3, and the speed governing device 30 determines, based on the signals from the first car speed detector 28 and the second car speed detector 29, whether or not the speed of the car 3 is abnormal. Only when it is determined that the speed of the car 3 is abnormal, the respective emergency stop devices 10 are supplied with powers from the first generator 26 and the second generator 27. Therefore, the respective emergency stop devices 10 can be prevented from malfunctioning. In addition, the respective emergency stop devices 10 can be operated more reliably when the speed of the car 3 is abnormal.
- the car 3 is mounted with the first car speed detector 28 and the second car speed detector 29, so signals from the first car speed detector 28 and the second car speed detector 29 can be transmitted to the speed governing device 30 more reliably.
- the pulley device 17 has the first driven pulley 14 and the second driven pulley 15, which are rotated in accordance with the speed of the car 3.
- the speed governing device 30 determines, based on rotation of the first driven pulley 14 and the second driven pulley 15, whether or not the speed of the car 3 is abnormal. Therefore, the determination can be made by the speed governing device 30 more reliably with a simple configuration.
- the speed governing device 30 has the first processing portion 34 for determining, based on rotation of the first driven pulley 14, whether or not the speed of the car 3 is abnormal, the second processing portion 35 for determining, based on rotation of the second driven pulley 15, whether or not the speed of the car 3 is abnormal, and the emergency output portion 36 for supplying the emergency stop devices 10 with powers from the first generator 26 and the second generator 27 when at least one of the first processing portion 34 and the second processing portion 35 has determined that the speed of the car 3 is abnormal. Therefore, a plurality of determinations can be made on the presence or absence of an abnormality in the speed of the car 3, and the reliability in determining whether or not the respective emergency stop devices 10 should be supplied with powers can be enhanced. Thus, the emergency stop devices 10 can further be prevented from malfunctioning.
- the governor rope 18, which is vertically stretched within the hoistway 1, is looped around the first driven pulley 14 and the second driven pulley 15 so as to surround them together.
- the first driven pulley 14 and the second driven pulley 15 are urged away from each other by the urging device 16 such that a tensile force is applied to the governor rope 18. Therefore, a large frictional force can be generated between the first driven pulley 14 and the governor rope 18 and between the second driven pulley 15 and the governor rope 18, respectively.
- the first driven pulley 14 and the second driven pulley 15 can be prevented from slipping with respect to the governor rope 18.
- the first driven pulley 14 and the second driven pulley 15 can be rotated more reliably in accordance with the speed of the car 3.
- the governor rope 18 is connected to the upper portion of the hoistway 1 via the spring 21 and to the lower portion of the hoistway 1 via the spring 22, so a tensile force can be applied to the governor rope 18.
- the increase in the length of the governor rope 18 can be absorbed by elasticity of the springs 21 and 22.
- the frictional forces between the first driven pulley 14 and the governor rope 18 and between the second driven pulley 15 and the governor rope 18, respectively can be prevented from decreasing.
- Fig. 4 is a plan view showing an elevator apparatus according to Embodiment 2 of the present invention.
- Fig. 5 is a front view showing an essential part of a pulley device of Fig. 4.
- the car 3 is mounted with a pulley device (rotational body device) 54.
- the pulley device 54 is provided in an upper portion of the car 3.
- the pulley device 54 has a first driven pulley (rotational body) 51 and a second driven pulley (rotational body) 52, which are arranged at an interval in a horizontal direction, and an urging device 53 for urging the first driven pulley 51 and the second driven pulley 52 away from each other.
- the first driven pulley 51 is disposed outward of the second driven pulley 52 with respect to the car 3 in the horizontal direction.
- Two groove portions 51a and 51b, along which the governor rope 18 is looped, are provided in an outer peripheral portion of the first driven pulley 51.
- a groove portion 52a, along which the governor rope 18 is looped, is provided in an outer peripheral portion of the second driven pulley 52.
- the governor rope 18 is looped around the first driven pulley 51 and the second driven pulley 52 so as to surround them together.
- a tensile force is applied to the governor rope 18 owing to respective urging forces of the springs 21 and 22 and the urging device 53.
- the car 3 is also mounted with a first generator 55 and a second generator 56, which generate powers as the car 3 moves.
- the first generator 55 is provided on a rotational shaft of the first driven pulley 51.
- the second generator 56 is provided on a rotational shaft of the second driven pulley 52.
- the first generator 55 generates a power corresponding to a speed of the car 3 based on rotation of the first driven pulley 51.
- the second generator 56 generates a power corresponding to a speed of the car 3 based on rotation of the second driven pulley 52.
- the respective emergency stop devices 10 are operated by the powers generated by the first generator 55 and the second generator 56 when the speed of the car 3 is abnormal.
- the first generator 55 is designed as an AC generator for generating a voltage with a frequency corresponding to rotation of the first driven pulley 51.
- the second generator 56 is designed as an AC generator for generating a voltage with a frequency corresponding to rotation of the second driven pulley 52.
- the car 3 is mounted with a speed governing device 57.
- the speed governing device 57 is allowed to perform a control operation by receiving the powers from the first generator 55 and the second generator 56.
- the speed governing device 57 determines, based on the frequencies of the voltages (information on the powers) generated by the first generator 55 and the second generator 56, respectively, whether or not the speed of the car 3 is abnormal, and supplies the respective emergency stop devices 10 with the powers generated by the first generator 55 and the second generator 56 only when the speed of the car 3 is abnormal.
- the speed governing device 57 has a first processing portion for determining, based on the frequency of the voltage from the first generator 55, whether or not the speed of the car 3 is abnormal, a second processing portion for determining, based on the frequency of the voltage from the second generator 56, whether or not the speed of the car 3 is abnormal, and an emergency output portion for supplying the respective emergency stop devices 10 with the powers from the first generator 55 and the second generator 56 when at least one of the first processing portion and the second processing portion has determined that the speed of the car 3 is abnormal.
- the speed governing device 57 is supplied with the powers from the first generator 55 and the second generator 56 not only as a power source for the control operation but also as information (car information) for detecting a speed of the car 3 and determining whether or not the speed of the car 3 is abnormal.
- Embodiment 2 of the present invention is identical to Embodiment 1 of the present invention in other constructional details.
- the speed governing device 57 determines, based on information on the respective powers from the first generator 55 and the second generator 56 (frequencies of voltages in this example), whether or not the speed of the car 3 is abnormal.
- the speed governing device 57 When the elevator is in normal operation and the speed of the car 3 is normal, the speed governing device 57 does not determine that the speed of the car 3 is abnormal, so no power is supplied from the speed governing device 57 to the respective emergency stop devices 10.
- the speeds generated by the first generator 55 and the second generator 56 are supplied from the speed governing device 57 to the respective emergency stop devices 10.
- the respective emergency stop devices 10 are operated, so the car 3 is stopped from moving.
- the speed governing device 57 acquires the frequencies of the voltages from the first generator 55 and the second generator 56 as information on the powers, determines, based on the information on the powers, whether or not the speed of the car 3 is abnormal, and supplies the respective emergency stop devices 10 with the powers from the first generator 55 and the second generator 56 only when it is determined that the speed of the car 3 is abnormal. Therefore, the speed of the car 3 can be detected without using a dedicated speed detector for detecting the speed of the car 3. Thus, the number of parts can be reduced, so cost reduction and size reduction can be achieved.
- the first driven pulley 51 and the second driven pulley 52 are arranged at an interval in the horizontal direction. Therefore, the dimension of the pulley device 54 in a height direction can be reduced, and the dimension of the hoistway 1 in a height direction can be reduced. Thus, the elevator apparatus can be reduced in size.
- the frequencies of the voltages are used as the information on the powers in order for the speed governing device 57 to detect the speed of the car 3.
- any information changing in accordance with the speed of the car 3 may be used.
- the magnitudes of the voltages may be used. It is also appropriate to provide loads such as resistors or the like at output portions of the generators from which outputs are transmitted to the speed governing device, thereby using the magnitudes of currents or frequencies as the information on the powers.
- the speed governing device 57 can determine whether or not the speed of the car 3 is abnormal, and the dedicated speed detector for detecting the speed of the car 3 can be dispensed with.
- two driven pulleys rotated in accordance with the speed of the car 3 namely, the first driven pulley and the second driven pulley are employed.
- the speed governing device can calculate a speed of the car 3 based on rotation of the driven pulley and determine whether or not the speed of the car 3 is abnormal.
- the governor rope 18 is looped around only the single driven pulley. A tensile force is applied to the governor rope 18 owing to urging forces of the springs 21 and 22.
- the speed governing device is provided with three or more processing portions corresponding to the driven pulleys, respectively.
- Each of the processing portions determines, based on rotation of a corresponding one of the driven pulleys, whether or not the speed of the car 3 is abnormal.
- the emergency output portion supplies the respective emergency stop devices 10 with powers from the first generator and the second generator when the number of the processing portions having determined that the speed of the car 3 is abnormal is larger than the number of the processing portions having determined that the speed of the car 3 is normal.
- the speed governing device supplies the respective emergency stop devices 10 with powers from the generators when two or three processing portions have determined that the speed of the car 3 is abnormal. In this manner, even when an erroneous determination has been made on rotation of one or some of the driven pulleys, it is possible to determine, based on determinations made on the other pulleys, whether to supply the respective emergency stop devices 10 with powers. As a result, the reliability of the determination made by the speed governing device can be enhanced.
- the governor rope 18 is connected to the upper portion of the hoistway 1 and the lower portion of the hoistway 1 via the springs 21 and 22, respectively.
- the governor rope 18 may be connected to only the upper portion of the hoistway 1 or the lower portion of the hoistway 1 via a spring. In this manner as well, an increase in the length of the governor rope 18 can be absorbed by the spring, and the magnitude of a frictional force between each of the driven pulleys and the governor rope 18 can be prevented from decreasing.
- the car 3 is mounted with the pulley device, the emergency stop devices, the speed governing device, and the backup circuit.
- the counterweight 4 may be mounted with these components, or both the car 3 and the counterweight 4 may be mounted with these components, respectively.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
Description
- The present invention relates to an elevator apparatus equipped with an emergency stop device for forcibly stopping a car or a counterweight.
- In a conventional elevator apparatus, a car may be mounted with an emergency stop device which operates through an electromagnetic actuator to swiftly perform an operation of stopping the car. The electromagnetic actuator is operated by being supplied with a power from a battery (see Patent Document 1).
- Patent Document 1:
WO 2004-083091 - In recent years, small-sized, large-capacity batteries have been developed to be utilized for portable components and the like owing to the progress of battery technology. However, those batteries are not sufficient in terms of life or the like when they are used as a power source for an emergency stop device. Large-capacitance capacitors and the like have also been developed, but they are designed to use electric energy stored in the past and gradually discharge the electric energy as time elapses. Therefore, they are not guaranteed to supply power at a desired moment. Accordingly, there have been demands to cause an emergency stop device to operate more swiftly and more reliably.
- The present invention has been made to solve the above-mentioned problems, and it is therefore an obj ect of the present invention to obtain an elevator apparatus in which an emergency stop device for forcibly stopping raised/lowered bodies is allowed to operate more swiftly and more reliably when a car and a counterweight (raised/lowered bodies) are traveling at an excessively high speed.
- An elevator apparatus according to the present invention includes: a generator for generating a power corresponding to a speed of a raised/lowered body; and an emergency stop device with which the raised/lowered body is mounted, for being operated by the power generated by the generator to forcibly brake the raised/lowered body when the speed of the raised/lowered body is abnormal.
-
- Fig. 1 is a schematic diagram showing an elevator apparatus according to Embodiment 1 of the present invention.
- Fig. 2 is a schematic diagram showing an essential part of the elevator apparatus of Fig. 1.
- Fig. 3 is a lateral view showing the pulley device of Fig. 2.
- Fig. 4 is a plan view showing an elevator apparatus according to
Embodiment 2 of the present invention. - Fig. 5 is a front view showing an essential part of a pulley device of Fig. 4.
- Preferred embodiments of the present invention will be described hereinafter with reference to the drawings.
- Fig. 1 is a schematic diagram showing an elevator apparatus according to Embodiment 1 of the present invention. Referring to the figure, a pair of
car guide rails 2 and a pair of counterweight guide rails (not shown) are installed within a hoistway 1. Acar 3 as a raised/lowered body is disposed between the respectivecar guide rails 2, and acounterweight 4 as a raised/lowered body is disposed between the respective counterweight guide rails. Thecar 3 is raised/lowered within the hoistway 1 while being guided by the respectivecar guide rails 2, and thecounterweight 4 is raised/lowered within the hoistway 1 while being guided by the respective counterweight guide rails. - A
deflector pulley 5, a hoisting machine 6 as a drive device for generating a driving force for raising/lowering thecar 3 and thecounterweight 4, are provided in an upper portion of the hoistway 1. The hoistingmachine 6 has a drive device body 7 including a motor, and adrive sheave 8 rotated by the drive device body 7. A plurality ofmain ropes 9 are looped around thedeflector pulley 5 and thedrive sheave 8. Thecar 3 and thecounterweight 4 are suspended within the hoistway 1 by means of the respectivemain ropes 9. Thecar 3 and thecounterweight 4 are raised/lowered within the hoistway 1 through rotation of thedrive sheave 8. - The
car 3 is mounted with a pair ofemergency stop devices 10 facing thecar guide rails 2, respectively. Theemergency stop devices 10 have braking portions 11 for generating braking forces applied to thecar 3 andelectromagnetic drive portions 12 for operating the braking portions 11 through energization, respectively. The braking portions 11 havewedges 13, which can move into contact with and away from thecar guide rails 2, respectively. Thewedges 13 are pressed against thecar guide rails 2, respectively, through operation of the braking portions 11, respectively. When thewedges 13 are pressed against thecar guide rails 2, respectively, the braking portions 11 thereby generate braking forces applied to thecar 3, respectively. Thecar 3 is forcibly stopped by the braking forces generated through operations of the respective braking portions 11. - The
car 3 is also mounted with a pulley device (rotational body device) 17, which has a first drivenpulley 14 and a second drivenpulley 15 as a pair of rotational bodies rotated in accordance with the speed of thecar 3 and anurging device 16 for urging the first drivenpulley 14 and the second drivenpulley 15 away from each other. In this example, thepulley device 17 is provided on a lower portion of thecar 3. The first drivenpulley 14 and the second drivenpulley 15 are disposed vertically in alignment with each other. That is, the first driven pulley (one of the rotational bodies) 14 is disposed above the second driven pulley (the other rotational body) 15. Agovernor rope 18 is looped around the first drivenrope 14 and the second drivenrope 15 so as to surround them together. - An upper fixed
member 19 and a lower fixedmember 20, which are fixed to thecar guide rails 2, respectively, are provided in the upper portion of the hoistway 1 and a lower portion of the hoistway 1, respectively. Thegovernor rope 18 is connected at one end thereof to the upper fixedmember 19 via a spring (elastic body) 21. Thegovernor rope 18 is connected at the other end thereof to thelower fixedmember 20 via a spring (elasticbody) 22. The governor rope 18, which extends from the lower fixedmember 20 side to the upper fixedmember 19 side, is looped around the first drivenpulley 14 and then around the second drivenpulley 15. - A tensile force is applied to the
governor rope 18 owing to respective urging forces of thesprings urging device 16. Thus, frictional forces are generated between thegovernor rope 18 and the first drivenpulley 14 and between thegovernor rope 18 and the second drivenpulley 15, respectively. As a result, the first drivenpulley 14 and the second drivenpulley 15 are prevented from slipping with respect to thegovernor rope 18. Thepulley device 17 is moved with respect to thegovernor rope 18 when thecar 3 is raised/lowered within the hoistway 1. The first drivenpulley 14 and the second drivenpulley 15 are thereby rotated in accordance with the speed of thecar 3. In other words, the rotational speeds of the first drivenpulley 14 and the second drivenpulley 15 increase as the speed of thecar 3 increases, and decrease as the speed of thecar 3 decreases. - A car shock absorber 23 for absorbing a shock caused to the
car 3 upon a fall thereof and a counterweight shock absorber 24 for absorbing a shock caused to thecounterweight 4 upon a fall thereof are installed on a bottom portion within the hoistway 1. A control cable (mobile cable) 25 for transmitting information between a control device (not shown) for controlling operation of an elevator and thecar 3 is connected to thecar 3. - Fig. 2 is a schematic diagram showing an essential part of the elevator apparatus of Fig. 1. Fig. 3 is a lateral view showing the
pulley device 17 of Fig. 2. Referring to the figures, thecar 3 is mounted with afirst generator 26 and asecond generator 27 for generating power through movement of thecar 3, and a firstcar speed detector 28 and a secondcar speed detector 29 for detecting a speed of thecar 3. Thefirst generator 26 and the firstcar speed detector 28 are provided on a rotational shaft of the first drivenpulley 14. Thesecond generator 27 and the secondcar speed detector 29 are provided on a rotational shaft of the second drivenpulley 15. Thefirst generator 26 and the firstcar speed detector 28 may be integrated with the first drivenpulley 14 or engaged with an outer peripheral portion of the first drivenpulley 14 instead of being provided on the rotational shaft of the first drivenpulley 14. Thesecond generator 27 and the secondcar speed detector 29 may be integrated with the second drivenpulley 15 or engaged with an outer peripheral portion of the second drivenpulley 15 instead of being provided on the rotational shaft of the second drivenpulley 15. - The
first generator 26 generates a power corresponding to a speed of thecar 3 based on rotation of the first drivenpulley 14. Thesecond generator 27 generates a power corresponding to a speed of thecar 3 based on rotation of the second drivenpulley 15. The respectiveemergency stop devices 10 are operated by the powers generated by thefirst generator 26 and thesecond generator 27 when the speed of thecar 3 is abnormal (excessively high). That is, the magnitudes of the powers generated by thefirst generator 26 and thesecond generator 27 increase as the speed of thecar 3 increases, so theemergency stop devices 10 do not operate until the magnitudes of the powers generated by thefirst generator 26 and thesecond generator 27 reach predetermined values at the time when the speed of thecar 3 has abnormally increased. - The first
car speed detector 28 generates a signal corresponding to a speed of thecar 3 based on rotation of the first drivenpulley 14. The secondcar speed detector 29 generates a signal corresponding to a speed of thecar 3 based on rotation of the second drivenpulley 15. For example, encoders can be mentioned as the firstcar speed detector 28 and the secondcar speed detector 29. - The
car 3 is mounted with aspeed governing device 30 and abackup circuit 31 for supplying theelectromagnetic drive portions 12 with powers from thefirst generator 26 and thesecond generator 27 only when the speed of thecar 3 is abnormal. - The
speed governing device 30 has apower receiving portion 32 for receiving powers from thefirst generator 26 and thesecond generator 27, and a speedgoverning control portion 33 for determining, based on respective pieces of information from the firstcar speed detector 28 and the secondcar speed detector 29, whether or not the speed of thecar 3 is abnormal, thereby supplying the respectiveemergency stop devices 10 with the powers received by thepower receiving portion 32 only when the speed of thecar 3 is abnormal. - The
power receiving portion 32 supplies the speedgoverning control portion 33 with the powers from thefirst generator 2 6 and thesecond generator 27 as a control power source for a control operation of thespeed governing device 30 and an emergency operation power source for causing theelectromagnetic drive portions 12 of theemergency stop devices 10 to operate. - The speed
governing control portion 33 is allowed to perform the control operation by being supplied with the control power source from thepower receiving portion 32. The speedgoverning control portion 33 has a first processing portion 34 for determining, based on information from the firstcar speed detector 28, whether or not the speed of thecar 3 is abnormal, asecond processing portion 35 for determining, based on information from the secondcar speed detector 29, whether or not the speed of thecar 3 is abnormal, and anemergency output portion 36 for supplying the respectiveemergency stop devices 10 with the emergency operation power source from thepower receiving portion 32 when at least one of the first processing portion 34 and thesecond processing portion 35 has determined that the speed of thecar 3 is abnormal. - An overspeed setting pattern as a reference for determining whether or not the speed of the
car 3 is abnormal, which corresponds to a vertical position within the hoistway 1, is set in advance in each of the first processing portion 34 and thesecond processing portion 35. In this example, the overspeed setting pattern is set so as to continuously decrease within a predetermined section in the vicinity of each of terminal portions (upper terminal portion and lower terminal portion) of the hoistway 1 as the distance therefrom decreases. - The first processing portion 34 has a
first calculation portion 37 for acquiring a signal from the firstcar speed detector 28 as car information and calculating a position and a speed of thecar 3 based on the acquired car information, and afirst determination portion 38 for comparing the position and the speed of thecar 3 calculated by thefirst calculation portion 37 with the overspeed setting pattern to determine whether or not the speed of thecar 3 is abnormal. - The
second processing portion 35 has asecond calculation portion 39 for acquiring a signal from the secondcar speed detector 29 as car information and calculating a position and a speed of thecar 3 based on the acquired car information, and asecond determination portion 40 for comparing the position and the speed of thecar 3 calculated by thesecond calculation portion 39 with the overspeed setting pattern to determine whether or not the speed of thecar 3 is abnormal. - The
emergency output portion 36 determines, based on respective pieces of information from thefirst determination portion 38 and thesecond determination portion 40, whether or not the respectiveemergency stop devices 10 should be supplied with the emergency operation power source from thepower receiving portion 32. That is, theemergency output portion 36 determines, based on dual determinations, namely, a determination made by thefirst determination portion 38 and a determination made by thesecond determination portion 40, whether or not the respectiveemergency stop devices 10 should be supplied with the emergency operation power source from thepower receiving portion 32. - The
backup circuit 31 determines, based on magnitudes of powers from thefirst generator 26 and thesecond generator 27, whether or not the speed of thecar 3 is abnormal, and supplies theelectromagnetic drive portions 12 with the powers from thefirst generator 26 and thesecond generator 27 only when it is determined that the speed of thecar 3 is abnormal. An abnormality determination set value as a reference for determining whether or not the speed of thecar 3 is abnormal through a comparison between the magnitudes of the powers from thefirst generator 26 and thesecond generator 27 is set in thebackup circuit 31. The abnormality determination set value is set higher than a rated speed of the elevator. - When the
electromagnetic drive portions 12 are supplied with powers from at least one of thespeed governing device 30 and thebackup circuit 31, the respectiveemergency stop devices 10 are thereby operated to forcibly generate braking forces applied to thecar 3. - Next, an operation will be described. When the
car 3 is moved within the hoistway 1, the first drivenpulley 14 and the second drivenpulley 15 are rotated in accordance with a speed of thecar 3. Thus, powers corresponding to the speed of thecar 3 are supplied from thefirst generator 26 and thesecond generator 27 to thespeed governing device 30 and thebackup circuit 31, and signals corresponding to the speed of thecar 3 are transmitted from the firstcar speed detector 28 and the secondcar speed detector 29 to thespeed governing device 30. - The control operation of the
speed governing device 30 is performed in response to the supply of powers from thefirst generator 26 and thesecond generator 27. Owing to the control operation of thespeed governing device 30, the first processing portion 34 determines, based on the signal from the firstcar speed detector 28, whether or not the speed of thecar 3 is abnormal, and thesecond processing portion 35 determines, based on the signal from the secondcar speed detector 29, whether or not the speed of thecar 3 is abnormal. - In parallel with the determination made by the
speed governing device 30, thebackup circuit 31 determines, based on the magnitudes of the powers from thefirst generator 26 and thesecond generator 27, whether or not the speed of thecar 3 is abnormal. - When the elevator is in normal operation and the speed of the
car 3 is normal, the respectiveemergency stop devices 10 are stopped from being supplied with powers from thespeed governing device 30 and thebackup circuit 31, respectively. Thus, thecar 3 is not forcibly stopped through operations of the respectiveemergency stop devices 10. - For example, when the speed of the
car 3 has abnormally increased owing to breakage of themain ropes 9, or the like and at least one of the first processing portion 34 and thesecond processing portion 35 has determined that the speed of thecar 3 is abnormal, the powers generated by thefirst generator 26 and thesecond generator 27 are supplied to the respectiveemergency stop devices 10 from theemergency output portion 36 of thespeed governing device 30. - Even in a case where no power is supplied from the
speed governing device 30 to the respectiveemergency stop devices 10, when thebackup circuit 31 has determined that the speed of thecar 3 is abnormal, the powers generated by thefirst generator 26 and thesecond generator 27 are supplied from thebackup circuit 31 to the respectiveemergency stop devices 10. - The magnitudes of the powers supplied to the respective
emergency stop devices 10 from each of thespeed governing device 30 and thebackup circuit 31 are large enough to operate the respectiveemergency stop devices 10 because the speed of thecar 3 has abnormally increased. Accordingly, when the speed of thecar 3 has abnormally increased, the respectiveemergency stop devices 10 are supplied with a power from thespeed governing device 30 or thebackup circuit 31 to be operated, so thecar 3 is stopped from moving. - In the elevator apparatus constructed as described above, the
first generator 26 and thesecond generator 27 generate powers corresponding to the speed of thecar 3, and theemergency stop devices 10 are operated by the powers of thefirst generator 26 and thesecond generator 27 at the time when the speed of thecar 3 is abnormal. Therefore, moving energy of thecar 3 can be converted intoapower. Even when the speed of thecar 3 has abnormally increased in the event of a blackout, powers large enough to operate the respectiveemergency stop devices 10 can be generated by thefirst generator 26 and thesecond generator 27. Accordingly, the emergency stop devices can be prevented from failing to operate for reasons of, for example, a deterioration in a battery, in the event of a blackout. As a result, theemergency stop devices 10 can be operated more reliably in a shorter period of time. - The
car 3 is mounted with thefirst generator 26 and thesecond generator 27, so the respectiveemergency stop devices 10 can be prevented from being stopped from being supplied with powers owing to, for example, breakage of thecontrol cable 25. As a result, the respectiveemergency stop devices 10 can be supplied with powers more reliably. - The first
car speed detector 28 and the secondcar speed detector 29 generate signals corresponding to the speed of thecar 3, and thespeed governing device 30 determines, based on the signals from the firstcar speed detector 28 and the secondcar speed detector 29, whether or not the speed of thecar 3 is abnormal. Only when it is determined that the speed of thecar 3 is abnormal, the respectiveemergency stop devices 10 are supplied with powers from thefirst generator 26 and thesecond generator 27. Therefore, the respectiveemergency stop devices 10 can be prevented from malfunctioning. In addition, the respectiveemergency stop devices 10 can be operated more reliably when the speed of thecar 3 is abnormal. - The
car 3 is mounted with the firstcar speed detector 28 and the secondcar speed detector 29, so signals from the firstcar speed detector 28 and the secondcar speed detector 29 can be transmitted to thespeed governing device 30 more reliably. - The
pulley device 17 has the first drivenpulley 14 and the second drivenpulley 15, which are rotated in accordance with the speed of thecar 3. Thespeed governing device 30 determines, based on rotation of the first drivenpulley 14 and the second drivenpulley 15, whether or not the speed of thecar 3 is abnormal. Therefore, the determination can be made by thespeed governing device 30 more reliably with a simple configuration. - The
speed governing device 30 has the first processing portion 34 for determining, based on rotation of the first drivenpulley 14, whether or not the speed of thecar 3 is abnormal, thesecond processing portion 35 for determining, based on rotation of the second drivenpulley 15, whether or not the speed of thecar 3 is abnormal, and theemergency output portion 36 for supplying theemergency stop devices 10 with powers from thefirst generator 26 and thesecond generator 27 when at least one of the first processing portion 34 and thesecond processing portion 35 has determined that the speed of thecar 3 is abnormal. Therefore, a plurality of determinations can be made on the presence or absence of an abnormality in the speed of thecar 3, and the reliability in determining whether or not the respectiveemergency stop devices 10 should be supplied with powers can be enhanced. Thus, theemergency stop devices 10 can further be prevented from malfunctioning. - The
governor rope 18, which is vertically stretched within the hoistway 1, is looped around the first drivenpulley 14 and the second drivenpulley 15 so as to surround them together. The first drivenpulley 14 and the second drivenpulley 15 are urged away from each other by the urgingdevice 16 such that a tensile force is applied to thegovernor rope 18. Therefore, a large frictional force can be generated between the first drivenpulley 14 and thegovernor rope 18 and between the second drivenpulley 15 and thegovernor rope 18, respectively. As a result, the first drivenpulley 14 and the second drivenpulley 15 can be prevented from slipping with respect to thegovernor rope 18. Thus, the first drivenpulley 14 and the second drivenpulley 15 can be rotated more reliably in accordance with the speed of thecar 3. - The
governor rope 18 is connected to the upper portion of the hoistway 1 via thespring 21 and to the lower portion of the hoistway 1 via thespring 22, so a tensile force can be applied to thegovernor rope 18. In addition, even when the length of thegovernor rope 18 has increased owing to changes over time or the like, the increase in the length of thegovernor rope 18 can be absorbed by elasticity of thesprings pulley 14 and thegovernor rope 18 and between the second drivenpulley 15 and thegovernor rope 18, respectively, can be prevented from decreasing. - Fig. 4 is a plan view showing an elevator apparatus according to
Embodiment 2 of the present invention. Fig. 5 is a front view showing an essential part of a pulley device of Fig. 4. Referring to the figures, thecar 3 is mounted with a pulley device (rotational body device) 54. Thepulley device 54 is provided in an upper portion of thecar 3. Thepulley device 54 has a first driven pulley (rotational body) 51 and a second driven pulley (rotational body) 52, which are arranged at an interval in a horizontal direction, and an urgingdevice 53 for urging the first drivenpulley 51 and the second drivenpulley 52 away from each other. - The first driven
pulley 51 is disposed outward of the second drivenpulley 52 with respect to thecar 3 in the horizontal direction. Two groove portions 51a and 51b, along which thegovernor rope 18 is looped, are provided in an outer peripheral portion of the first drivenpulley 51. Agroove portion 52a, along which thegovernor rope 18 is looped, is provided in an outer peripheral portion of the second drivenpulley 52. - The
governor rope 18 is looped around the first drivenpulley 51 and the second drivenpulley 52 so as to surround them together. Thegovernor rope 18, which extends from the lower fixedmember 20 side to the upper fixedmember 19 side, is looped around the first drivenpulley 51 along the groove portion 51a, around the second drivenpulley 52 along thegroove portion 52a, and then around the first drivenpulley 51 again along the groove portion 51b. A tensile force is applied to thegovernor rope 18 owing to respective urging forces of thesprings device 53. - The
car 3 is also mounted with afirst generator 55 and asecond generator 56, which generate powers as thecar 3 moves. Thefirst generator 55 is provided on a rotational shaft of the first drivenpulley 51. Thesecond generator 56 is provided on a rotational shaft of the second drivenpulley 52. - The
first generator 55 generates a power corresponding to a speed of thecar 3 based on rotation of the first drivenpulley 51. Thesecond generator 56 generates a power corresponding to a speed of thecar 3 based on rotation of the second drivenpulley 52. The respectiveemergency stop devices 10 are operated by the powers generated by thefirst generator 55 and thesecond generator 56 when the speed of thecar 3 is abnormal. In this example, thefirst generator 55 is designed as an AC generator for generating a voltage with a frequency corresponding to rotation of the first drivenpulley 51. Thesecond generator 56 is designed as an AC generator for generating a voltage with a frequency corresponding to rotation of the second drivenpulley 52. - The
car 3 is mounted with aspeed governing device 57. Thespeed governing device 57 is allowed to performa control operation by receiving the powers from thefirst generator 55 and thesecond generator 56. Thespeed governing device 57 determines, based on the frequencies of the voltages (information on the powers) generated by thefirst generator 55 and thesecond generator 56, respectively, whether or not the speed of thecar 3 is abnormal, and supplies the respectiveemergency stop devices 10 with the powers generated by thefirst generator 55 and thesecond generator 56 only when the speed of thecar 3 is abnormal. - The
speed governing device 57 has a first processing portion for determining, based on the frequency of the voltage from thefirst generator 55, whether or not the speed of thecar 3 is abnormal, a second processing portion for determining, based on the frequency of the voltage from thesecond generator 56, whether or not the speed of thecar 3 is abnormal, and an emergency output portion for supplying the respectiveemergency stop devices 10 with the powers from thefirst generator 55 and thesecond generator 56 when at least one of the first processing portion and the second processing portion has determined that the speed of thecar 3 is abnormal. - That is, the
speed governing device 57 is supplied with the powers from thefirst generator 55 and thesecond generator 56 not only as a power source for the control operation but also as information (car information) for detecting a speed of thecar 3 and determining whether or not the speed of thecar 3 is abnormal.Embodiment 2 of the present invention is identical to Embodiment 1 of the present invention in other constructional details. - Next, an operation will be described. When the first driven
pulley 51 and the second drivenpulley 52 are rotated through a movement of thecar 3, powers corresponding to a speed of thecar 3 are supplied from thefirst generator 55 and thesecond generator 56 to thespeed governing device 57. - Thus, the
speed governing device 57 determines, based on information on the respective powers from thefirst generator 55 and the second generator 56 (frequencies of voltages in this example), whether or not the speed of thecar 3 is abnormal. - When the elevator is in normal operation and the speed of the
car 3 is normal, thespeed governing device 57 does not determine that the speed of thecar 3 is abnormal, so no power is supplied from thespeed governing device 57 to the respectiveemergency stop devices 10. - For example, when the speed of the
car 3 has abnormally increased owing to breakage of themain ropes 9 and thespeed governing device 57 has determined that the speed of thecar 3 is abnormal, the powers generated by thefirst generator 55 and thesecond generator 56 are supplied from thespeed governing device 57 to the respectiveemergency stop devices 10. Thus, the respectiveemergency stop devices 10 are operated, so thecar 3 is stopped from moving. - In the elevator apparatus constructed as described above, the
speed governing device 57 acquires the frequencies of the voltages from thefirst generator 55 and thesecond generator 56 as information on the powers, determines, based on the information on the powers, whether or not the speed of thecar 3 is abnormal, and supplies the respectiveemergency stop devices 10 with the powers from thefirst generator 55 and thesecond generator 56 only when it is determined that the speed of thecar 3 is abnormal. Therefore, the speed of thecar 3 can be detected without using a dedicated speed detector for detecting the speed of thecar 3. Thus, the number of parts can be reduced, so cost reduction and size reduction can be achieved. - The first driven
pulley 51 and the second drivenpulley 52 are arranged at an interval in the horizontal direction. Therefore, the dimension of thepulley device 54 in a height direction can be reduced, and the dimension of the hoistway 1 in a height direction can be reduced. Thus, the elevator apparatus can be reduced in size. - In the foregoing example, the frequencies of the voltages are used as the information on the powers in order for the
speed governing device 57 to detect the speed of thecar 3. However, any information changing in accordance with the speed of thecar 3 may be used. For example, the magnitudes of the voltages may be used. It is also appropriate to provide loads such as resistors or the like at output portions of the generators from which outputs are transmitted to the speed governing device, thereby using the magnitudes of currents or frequencies as the information on the powers. In this manner as well, thespeed governing device 57 can determine whether or not the speed of thecar 3 is abnormal, and the dedicated speed detector for detecting the speed of thecar 3 can be dispensed with. - In the foregoing respective embodiments of the present invention, two driven pulleys rotated in accordance with the speed of the
car 3, namely, the first driven pulley and the second driven pulley are employed. However, only a single driven pulley may be employed. In this manner as well, the speed governing device can calculate a speed of thecar 3 based on rotation of the driven pulley and determine whether or not the speed of thecar 3 is abnormal. In this case, thegovernor rope 18 is looped around only the single driven pulley. A tensile force is applied to thegovernor rope 18 owing to urging forces of thesprings - Further, three or more driven pulleys may be employed. In this case, the speed governing device is provided with three or more processing portions corresponding to the driven pulleys, respectively. Each of the processing portions determines, based on rotation of a corresponding one of the driven pulleys, whether or not the speed of the
car 3 is abnormal. The emergency output portion supplies the respectiveemergency stop devices 10 with powers from the first generator and the second generator when the number of the processing portions having determined that the speed of thecar 3 is abnormal is larger than the number of the processing portions having determined that the speed of thecar 3 is normal. In a case where, for example, three driven pulleys are employed, the speed governing device supplies the respectiveemergency stop devices 10 with powers from the generators when two or three processing portions have determined that the speed of thecar 3 is abnormal. In this manner, even when an erroneous determination has been made on rotation of one or some of the driven pulleys, it is possible to determine, based on determinations made on the other pulleys, whether to supply the respectiveemergency stop devices 10 with powers. As a result, the reliability of the determination made by the speed governing device can be enhanced. - In the foregoing respective embodiments of the present invention, the
governor rope 18 is connected to the upper portion of the hoistway 1 and the lower portion of the hoistway 1 via thesprings governor rope 18 may be connected to only the upper portion of the hoistway 1 or the lower portion of the hoistway 1 via a spring. In this manner as well, an increase in the length of thegovernor rope 18 can be absorbed by the spring, and the magnitude of a frictional force between each of the driven pulleys and thegovernor rope 18 can be prevented from decreasing. - In the foregoing respective embodiments of the present invention, only the
car 3 is mounted with the pulley device, the emergency stop devices, the speed governing device, and the backup circuit. However, thecounterweight 4 may be mounted with these components, or both thecar 3 and thecounterweight 4 may be mounted with these components, respectively.
Claims (13)
- An elevator apparatus, characterized by comprising:a generator for generating a power corresponding to a speed of a raised/lowered body; andan emergency stop device with which the raised/lowered body is mounted, for being operated by the power generated by the generator to forcibly brake the raised/lowered body when the speed of the raised/lowered body is abnormal.
- The elevator apparatus according to Claim 1, characterized in that the raised/lowered body is mounted with the generator.
- The elevator apparatus according to Claim 1 or 2, characterized by further comprising:a speed detector for generating a signal corresponding to a speed of the raised/lowered body; anda speed governing device for acquiring the signal from the speed detector as raised/lowered body information, determining, based on the raised/lowered body information, whether or not the speed of the raised/lowered body is abnormal, and supplying the emergency stop device with the power from the generator only when it is determined that the speed of the raised/loweredbody is abnormal.
- The elevator apparatus according to Claim 3, characterized in that the raised/lowered body is mounted with the speed detector.
- The elevator apparatus according to Claim 1 or 2, characterized by further comprising:a speed governing device for acquiring information on the power from the generator as raised/lowered body information, determining, based on the raised/lowered body information, whether or not the speed of the raised/lowered body is abnormal, and supplying the emergency stop device with the power from the generator only when it is determined that the speed of the raised/loweredbody is abnormal.
- The elevator apparatus according to Claim 5, characterized in that the information on the power is a magnitude of a voltage.
- An elevator apparatus according to Claim 5, characterized in that the generator generates an alternating voltage, and
the speed governing device is supplied from the generator with a frequency of the voltage as the information on the power. - An elevator apparatus according to any one of Claims 3 to 7, characterized in that the elevator apparatus further comprises:a rotational body device having a rotational body rotated in accordance with a speed of the raised/lowered body, and in thatthe speed governing device acquires the raised/lowered body information based on rotation of the rotational body.
- The elevator apparatus according to Claim 8, characterized in that the rotational body device has a plurality of the rotational bodies, and
the speed governing device makes, based on the raised/lowered body information obtained from rotation of the respective rotational bodies, individual determinations on whether or not the speed of the raised/lowered body is abnormal, and supplies the emergency stop device with the power from the generator when at least one of the determinations has produced a result that the speed of the car is abnormal. - The elevator apparatus according to Claim 8, characterized in that the rotational body device has the three or more rotational bodies, and
the speed governing device makes, based on the raised/lowered body information obtained from rotation of the respective rotational bodies, individual determinations on whether or not the speed of the raised/lowered body is abnormal, and supplies the emergency stop device with the power from the generator when the determinations having produced a result that the speed of the raised/lowered body is abnormal are larger in number than the determinations having produced a result that the speed of the raised/lowered body is normal. - The elevator apparatus according to any one of Claims 8 to 10, characterized in that the rotational body device has a pair of the rotational bodies around which a governor rope connected to an upper portion of a hoistway and a lower portion of a hoistway is looped, and an urging device for urging the rotational bodies away from each other,
the raised/lowered body is mounted with the rotational body device,
the governor rope is looped around the respective rotational bodies so that the governor rope surrounds the respective rotational bodies together, and
the urging device urges the respective rotational bodies to apply a tensile force to the governor rope. - The elevator apparatus according to Claim 11, characterized in that the respective rotational bodies are arranged at an interval in a horizontal direction.
- The elevator apparatus according to Claim 11 or 12, characterized in that the governor rope is connected to at least one of the upper portion of the hoistway and the lower portion of the hoistway via an elastic body.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2005/007134 WO2006112008A1 (en) | 2005-04-13 | 2005-04-13 | Elevator device |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1870368A1 true EP1870368A1 (en) | 2007-12-26 |
EP1870368A4 EP1870368A4 (en) | 2012-07-11 |
EP1870368B1 EP1870368B1 (en) | 2019-04-03 |
Family
ID=37114761
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05730419.8A Expired - Fee Related EP1870368B1 (en) | 2005-04-13 | 2005-04-13 | Elevator device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1870368B1 (en) |
JP (1) | JP4917030B2 (en) |
CN (1) | CN101163636B (en) |
WO (1) | WO2006112008A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014012837A1 (en) * | 2012-07-18 | 2014-01-23 | Inventio Ag | Elevator system having a safety device |
CN104555680A (en) * | 2014-12-29 | 2015-04-29 | 昆山京都电梯有限公司 | Lift capable of automatically charging storage batteries |
WO2016016680A1 (en) * | 2014-08-01 | 2016-02-04 | Otis Elevator Company | Car mounted governor for an elevator system |
EP3130554A1 (en) * | 2015-08-13 | 2017-02-15 | Kone Corporation | An elevator |
EP2673232A4 (en) * | 2011-02-07 | 2017-11-22 | Otis Elevator Company | Elevator governor having two tripping mechanisms on separate sheaves |
DE202017005334U1 (en) * | 2017-10-17 | 2019-01-18 | Wittur Holding Gmbh | Device for controlling a speed limiter belt and electronic speed limiter |
EP3798174A1 (en) * | 2019-09-26 | 2021-03-31 | Inventio AG | Trigger device for a catching device |
RU2774373C2 (en) * | 2017-10-17 | 2022-06-20 | Виттур Холдинг ГМБХ | Device for control of speed limiter belt and electronic speed limiter |
WO2023247818A1 (en) * | 2022-06-22 | 2023-12-28 | Kone Corporation | Safety gear arrangement for elevator, elevator, and method of operation of safety gear arrangement for elevator |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102485627A (en) * | 2010-12-01 | 2012-06-06 | 傅涛 | Carrying device and carrying system |
JP5886370B2 (en) * | 2014-06-26 | 2016-03-16 | 東芝エレベータ株式会社 | Governor |
US11738971B2 (en) | 2021-06-25 | 2023-08-29 | Otis Elevator Company | Elevator governor tension frame damper |
CN113594922B (en) * | 2021-07-20 | 2024-02-02 | 广东深霖达电力有限公司 | Distribution switch convenient to dismouting |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06183660A (en) * | 1992-12-04 | 1994-07-05 | Otis Elevator Co | Device for preventing nalfunction of governor of elevator |
JPH1087212A (en) * | 1996-09-12 | 1998-04-07 | Hitachi Ltd | Speed governor for elevator |
JPH1121035A (en) * | 1997-07-04 | 1999-01-26 | Toshiba Corp | Elevator device |
US20010011618A1 (en) * | 1999-12-28 | 2001-08-09 | Shinobu Tajima | Elevator control apparatus using charge/discharge control circuit for power storage apparatus |
JP2002145539A (en) * | 2000-11-14 | 2002-05-22 | Mitsubishi Electric Corp | Elevator device |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55140471A (en) * | 1979-04-14 | 1980-11-01 | Hitachi Ltd | Elevator controller |
JPS60193373A (en) * | 1984-03-14 | 1985-10-01 | Mitsubishi Electric Corp | Semiconductor memory device |
JPS60193373U (en) * | 1984-05-30 | 1985-12-23 | 株式会社東芝 | Elevator safety device |
JPS6365680A (en) * | 1986-09-05 | 1988-03-24 | Nec Corp | Tunnel diode type semiconductor device |
JPH01317977A (en) * | 1988-06-17 | 1989-12-22 | Mitsubishi Electric Corp | Speed detector for elevator |
JP2001158579A (en) * | 1999-12-01 | 2001-06-12 | Hitachi Ltd | Governor for elevator and elevator |
JP2002255464A (en) * | 2001-02-14 | 2002-09-11 | Otis Elevator Co | Position detector for elevator |
JP4553535B2 (en) * | 2001-09-28 | 2010-09-29 | 三菱電機株式会社 | Elevator equipment |
JP2003267639A (en) * | 2002-03-14 | 2003-09-25 | Hitachi Ltd | Power supply unit of elevator car |
WO2004083090A1 (en) | 2003-03-18 | 2004-09-30 | Mitsubishi Denki Kabushiki Kaisha | Emergency stop device for elevator |
-
2005
- 2005-04-13 JP JP2007520984A patent/JP4917030B2/en not_active Expired - Fee Related
- 2005-04-13 CN CN2005800494566A patent/CN101163636B/en not_active Expired - Fee Related
- 2005-04-13 WO PCT/JP2005/007134 patent/WO2006112008A1/en not_active Application Discontinuation
- 2005-04-13 EP EP05730419.8A patent/EP1870368B1/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06183660A (en) * | 1992-12-04 | 1994-07-05 | Otis Elevator Co | Device for preventing nalfunction of governor of elevator |
JPH1087212A (en) * | 1996-09-12 | 1998-04-07 | Hitachi Ltd | Speed governor for elevator |
JPH1121035A (en) * | 1997-07-04 | 1999-01-26 | Toshiba Corp | Elevator device |
US20010011618A1 (en) * | 1999-12-28 | 2001-08-09 | Shinobu Tajima | Elevator control apparatus using charge/discharge control circuit for power storage apparatus |
JP2002145539A (en) * | 2000-11-14 | 2002-05-22 | Mitsubishi Electric Corp | Elevator device |
Non-Patent Citations (1)
Title |
---|
See also references of WO2006112008A1 * |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2673232A4 (en) * | 2011-02-07 | 2017-11-22 | Otis Elevator Company | Elevator governor having two tripping mechanisms on separate sheaves |
AU2013292128B2 (en) * | 2012-07-18 | 2016-10-27 | Inventio Ag | Elevator system having a safety device |
US9580275B2 (en) | 2012-07-18 | 2017-02-28 | Inventio Ag | Elevator system having a safety device |
CN104540763A (en) * | 2012-07-18 | 2015-04-22 | 因温特奥股份公司 | Elevator system having a safety device |
WO2014012837A1 (en) * | 2012-07-18 | 2014-01-23 | Inventio Ag | Elevator system having a safety device |
AU2013292128A8 (en) * | 2012-07-18 | 2016-11-24 | Inventio Ag | Elevator system having a safety device |
EP3194317B1 (en) | 2014-08-01 | 2019-03-27 | Otis Elevator Company | Car mounted governor for an elevator system |
WO2016016680A1 (en) * | 2014-08-01 | 2016-02-04 | Otis Elevator Company | Car mounted governor for an elevator system |
US10654685B2 (en) | 2014-08-01 | 2020-05-19 | Otis Elevator Company | Car mounted governor for an elevator system |
CN104555680A (en) * | 2014-12-29 | 2015-04-29 | 昆山京都电梯有限公司 | Lift capable of automatically charging storage batteries |
US10124991B2 (en) | 2015-08-13 | 2018-11-13 | Kone Corporation | Car speed monitoring assembly for an elevator |
EP3130554A1 (en) * | 2015-08-13 | 2017-02-15 | Kone Corporation | An elevator |
DE202017005334U1 (en) * | 2017-10-17 | 2019-01-18 | Wittur Holding Gmbh | Device for controlling a speed limiter belt and electronic speed limiter |
RU2774373C2 (en) * | 2017-10-17 | 2022-06-20 | Виттур Холдинг ГМБХ | Device for control of speed limiter belt and electronic speed limiter |
EP3798174A1 (en) * | 2019-09-26 | 2021-03-31 | Inventio AG | Trigger device for a catching device |
WO2023247818A1 (en) * | 2022-06-22 | 2023-12-28 | Kone Corporation | Safety gear arrangement for elevator, elevator, and method of operation of safety gear arrangement for elevator |
Also Published As
Publication number | Publication date |
---|---|
WO2006112008A1 (en) | 2006-10-26 |
CN101163636B (en) | 2010-05-12 |
JP4917030B2 (en) | 2012-04-18 |
JPWO2006112008A1 (en) | 2008-11-20 |
EP1870368B1 (en) | 2019-04-03 |
EP1870368A4 (en) | 2012-07-11 |
CN101163636A (en) | 2008-04-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1870368B1 (en) | Elevator device | |
CN101090854B (en) | Device for elevator | |
EP2695841B1 (en) | Elevator device | |
US8631908B2 (en) | Elevator system and associated method including power control for operating an elevator in an emergency mode | |
EP2380841A1 (en) | Elevator device | |
US10669121B2 (en) | Elevator accelerometer sensor data usage | |
EP2774886B1 (en) | Traction sheave elevator | |
EP2186768A1 (en) | Elevator device | |
EP2636626A1 (en) | Elevator device | |
EP3228572B1 (en) | Uninterrupted rescue operation | |
WO2014097373A1 (en) | Elevator device | |
WO2006103768A1 (en) | Elevator apparatus | |
JP4403123B2 (en) | Elevator equipment | |
US11261055B2 (en) | Elevator emergency stop systems | |
EP1900673A1 (en) | Tension pulley device for elevator governor rope | |
JP2004155519A (en) | Elevator device | |
JPWO2013179336A1 (en) | Elevator equipment | |
US20180016114A1 (en) | Advanced smooth rescue operation | |
JPWO2007055020A1 (en) | Elevator equipment | |
JP2007176624A (en) | Elevator | |
KR100913462B1 (en) | Elevator device | |
JP2011121742A (en) | Elevator braking device | |
CN108116959B (en) | Speed governor and elevator device | |
CN112850402A (en) | Emergency stop system for elevator | |
CN110191854B (en) | Elevator device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20071018 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR NL PT |
|
DAX | Request for extension of the european patent (deleted) | ||
RBV | Designated contracting states (corrected) |
Designated state(s): DE ES FR NL PT |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 20120608 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: B66B 1/32 20060101ALI20120601BHEP Ipc: B66B 5/18 20060101ALI20120601BHEP Ipc: B66B 5/06 20060101AFI20120601BHEP Ipc: B66B 1/30 20060101ALI20120601BHEP Ipc: B66B 1/34 20060101ALI20120601BHEP Ipc: B66B 5/04 20060101ALI20120601BHEP |
|
17Q | First examination report despatched |
Effective date: 20120822 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20181026 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR NL PT |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602005055592 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20190403 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190803 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602005055592 Country of ref document: DE |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20200106 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190603 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20200331 Year of fee payment: 16 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602005055592 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20211103 |